Knowledge Base

BUG: C2955 Error Generated If Using Same Name as Template

Article ID: 139296

Article Last Modified on 12/9/2003

Microsoft Visual C++ 2.0 Professional Edition
Microsoft Visual C++ 2.1
Microsoft Visual C++ 2.2
Microsoft Visual C++ 4.0 Standard Edition
Microsoft Visual C++ 4.1 Subscription
Microsoft Visual C++ 4.2 Enterprise Edition
Microsoft Visual C++ 5.0 Enterprise Edition
Microsoft Visual C++ 4.2 Professional Edition
Microsoft Visual C++ 5.0 Professional Edition

This article was previously published under Q139296

SYMPTOMS

Using the name of a template class as a void * parameter to a function, as illustrated in this article results in this error:

C:\test.cpp(6) : error C2955: 'a' class template name expecting parameter list

WORKAROUND

The resolution to this problem depends on which version of Visual C++ is being used. For Visual C++ 2.x, either change the parameter name, change the parameter type from a void * to non pointer data type, or do not use a template class.

For Visual C++ version 4.0 and later, you may use one of the version 2.x workarounds, or use namespaces. Consult your Visual C++ documentation for more information on how to use namespaces.

STATUS

Microsoft has confirmed this to be a bug in the Microsoft products listed at the beginning of this article. We are researching this problem and will post new information here in the Microsoft Knowledge Base as it becomes available.

MORE INFORMATION

Sample Code

   /* Compile options needed: none
   */ 

   template<class T>
   class a
   {
   };

   void fn( void* a );

Additional query words: kbVC400bug name space

Keywords: kbbug kbcpponly kbcompiler KB139296